Bruguière, 1792: synonym of Conus princeps Linnaeus, 1758 Conus regus: synonym of Conus princeps Linnaeus, 1758 Conus remo Brazier, 1898: synonym of Conus anemone Lamarck, 1810 Conus reteaureum Perry, 1811: synonym of Conus textile Linnaeus, 1758 Conus reticularis Bory de Saint Vincent, 1827: synonym of Conus mercator Linnaeus, 1758 Conus reticulatus Perry, 1811: synonym of Conus araneosus [Lightfoot], 1786 Conus reticulatus Born, 1778: synonym of Conus mercator Linnaeus, 1758 Conus reticulatus G. B. Sowerby I, 1834: synonym of Conasprella lucida (W. Wood, 1828) Conus rhododendron Jay, 1839: synonym of Conus adamsonii Broderip, 1836 Conus richardi Fenaux, 1942: synonym of Conus fumigatus Hwass in Bruguière, 1792 Conus rikae (Petuch & Berschauer, 2018): synonym of Conus mercator Linnaeus, 1758 Conus riosi Petuch, 1986: synonym of Conus daucus riosi Petuch, 1986 Conus rivularius Reeve, 1849: synonym of Conus boeticus Reeve, 1844 Conus roatanensis Petuch & Sargent, 2011: synonym of Conasprella roatanensis (Petuch & Sargent, 2011) Conus roberti Richard, 2009: synonym of Conasprella roberti (Richard, 2009) Conus robillardi Bernardi, 1858: synonym of Conus vexillum Gmelin, 1791 Conus rogmartini da Motta, 1982: synonym of Conasprella otohimeae (Kuroda & Itô, 1961) Conus rollandi Bernardi, 1860: synonym of Conus magus Linnaeus, 1758 Conus roosevelti Bartsch & Rehder, 1939: synonym of Conus tiaratus G. B. Sowerby I, 1833 Conus roquensis (Cossignani & Fiadeiro, 2015): synonym of Conus damottai Trovão, 1979 Conus rosaceus Kiener, 1849: synonym of Conus iodostoma Reeve, 1843 Conus rosaceus Dillwyn, 1817: synonym of Conus tinianus Hwass in Bruguière, 1792 Conus rosaceus G. B. Sowerby I, 1834: synonym of Conasprella mindana (Hwass in Bruguière, 1792) Conus roseotinctus G. B. Sowerby II, 1866: synonym of Conus anemone Lamarck, 1810 Conus roseus Fischer von Waldheim, 1807: synonym of Conus granulatus Linnaeus, 1758 Conus roseus Lamarck, 1810: synonym of Conus biliosus (Röding, 1798) Conus rosiae (Monnier, Batifoix & Limpalaër, 2018): synonym of Conus behelokensis Lauer, 1989 Conus rossiteri Brazier, 1870: synonym of Conus papilliferus G. B. Sowerby I, 1834 Conus rubescens Bonnet, 1864: synonym of Conus canonicus Hwass in Bruguière, 1792 Conus rubiginosus Hwass in Bruguière, 1792: synonym of Conus pennaceus Born, 1778 Conus rubropennatus da Motta, 1982: synonym of Conus pennaceus Born, 1778 Conus rudiae Magnotte, 1971: synonym of Conus patae Abbott, 1971 Conus rudis Weinkauff, 1873: synonym of Conus ermineus Born, 1778 Conus ruppellii Reeve, 1848: synonym of Conus boeticus Reeve, 1844 Conus rusticus Linnaeus, 1758 (unaccepted, Nomenclaturally invalid name, placed on the Official Index of Invalid